"I have this final say in my tree. It is special in that a lot of people trust my tree. So some people will not use it if it is not my tree. That is a minority. But most people end up using various appendages. My tree is really not. Yes I have the final say on my tree. There is always this forking but there is always this joining. There is more forking than there is joining. But that just means that there are all these dead branches that not end up not being interesting. My branch is to some degree, you could think of it as the trunk of the tree. People try to join back into my tree."

Torvalds on Linux, SCO and IBM article [silicon valley]